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[ZOOKEEPER-1757] Adler32 may not be sufficient to protect against data corruption - Zookeeper - [issue]
...I was investigating data inconsistency bug in our internal branch. One possible area is snapshot/txnlog corruption. So I wrote a more robust corruption test and found that it is easy to brea...
http://issues.apache.org/jira/browse/ZOOKEEPER-1757    Author: Thawan Kooburat, 2013-09-14, 03:04
Re: determining ZK latency issues - Zookeeper - [mail # user]
...Since you mentioned that you have a high load such that you need to disable fsync  I would suggested that you might want to start monitoring JVM stats (via JMX) such as heap or gc activ...
   Author: Thawan Kooburat, 2013-08-09, 02:35
[expand - 1 more] - Re: Zookeeper ensemble backup questions? - Zookeeper - [mail # user]
...You don't need to stop ZooKeeper or wait until the system become idle. You can do a live backup.  When you perform a backup, and restore from that backup.  This will give you the s...
   Author: Thawan Kooburat, 2013-07-19, 22:49
Re: Watching children updates - Zookeeper - [mail # user]
...ZOOKEEPER-1416 is another way of solving the problem of watching a sub-tree  Thawan Kooburat      On 7/17/13 10:50 PM, "kishore g"  wrote:  ...
   Author: Thawan Kooburat, 2013-07-18, 07:08
[expand - 2 more] - Re: Maximum size of a snapshot - Zookeeper - [mail # user]
...Client will get session expire event only when a server explicitly tells the client. So any established sessions will remain in a disconnected state during the period  So my comment abo...
   Author: Thawan Kooburat, 2013-07-17, 03:40
[ZOOKEEPER-1722] Make ZooKeeper clients more test friendly - Zookeeper - [issue]
...We should be able to expose a few more API calls that allow user write unit tests that cover various failure scenarios (similar to the TestableZookeer in zookeeper test). This should also mi...
http://issues.apache.org/jira/browse/ZOOKEEPER-1722    Author: Thawan Kooburat, 2013-07-16, 04:45
Re: When will the new 4LTR command "snap" be available in the zookeeper official release? - Zookeeper - [mail # user]
...Just created a JIRA:  https://issues.apache.org/jira/browse/ZOOKEEPER-1729  You can track the progress of the feature through that ticket.  Thawan Kooburat      ...
   Author: Thawan Kooburat, 2013-07-16, 03:34
[expand - 1 more] - Re: Efficient backup and a reasonable restore of an ensemble - Zookeeper - [mail # user]
...On restore part, I think having a separate utility to manipulate the data/snap dir (by truncating the log/removing snapshot to a given zxid) would be easier than modifying the server.  ...
   Author: Thawan Kooburat, 2013-07-09, 03:09
[expand - 1 more] - Re: Taking two snapshots at the same time - Zookeeper - [mail # dev]
...I just add a new 4 letter command (snap).  This will cause the server to take snapshot if txn count (since last snapshot) is below configurable threshold (default 1000).  We used t...
   Author: Thawan Kooburat, 2013-07-08, 23:02
Make zookeeper more test friendly - Zookeeper - [mail # dev]
...Many recent issues that I saw internally is due to incorrect handling or no sufficient testing on ZooKeeper failure scenario in the custom wrapper API or in the applications.  I am thin...
   Author: Thawan Kooburat, 2013-06-28, 01:39
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